Check out this shower head... and it comes in 110... so you could install it in your travel trailer!
http://www.tanklesswaterheater.com/products2.html#laser1
You could use your current small water heater for dishes and such and this for showers!
http://www.tanklesswaterheater.com/products2.html#laser1
You could use your current small water heater for dishes and such and this for showers!